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Banerjee S, Vernon S, Ruchti E, Limoni G, Jiao W, Asadzadeh J, Van Campenhoudt M, McCabe BD. Trio preserves motor synapses and prolongs motor ability during aging. Cell Rep 2024; 43:114256. [PMID: 38795343 DOI: 10.1016/j.celrep.2024.114256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 01/24/2024] [Accepted: 05/05/2024] [Indexed: 05/27/2024] Open
Abstract
The decline of motor ability is a hallmark feature of aging and is accompanied by degeneration of motor synaptic terminals. Consistent with this, Drosophila motor synapses undergo characteristic age-dependent structural fragmentation co-incident with diminishing motor ability. Here, we show that motor synapse levels of Trio, an evolutionarily conserved guanine nucleotide exchange factor (GEF), decline with age. We demonstrate that increasing Trio expression in adult Drosophila can abrogate age-dependent synaptic structural fragmentation, postpone the decline of motor ability, and maintain the capacity of motor synapses to sustain high-intensity neurotransmitter release. This preservative activity is conserved in transgenic human Trio, requires Trio Rac GEF function, and can also ameliorate synapse degeneration induced by depletion of miniature neurotransmission. Our results support a paradigm where the structural dissolution of motor synapses precedes and promotes motor behavioral diminishment and where intervening in this process can postpone the decline of motor function during aging.
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Affiliation(s)
- Soumya Banerjee
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, VD 1015 Lausanne, Switzerland
| | - Samuel Vernon
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, VD 1015 Lausanne, Switzerland
| | - Evelyne Ruchti
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, VD 1015 Lausanne, Switzerland
| | - Greta Limoni
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, VD 1015 Lausanne, Switzerland
| | - Wei Jiao
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, VD 1015 Lausanne, Switzerland
| | - Jamshid Asadzadeh
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, VD 1015 Lausanne, Switzerland
| | - Marine Van Campenhoudt
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, VD 1015 Lausanne, Switzerland
| | - Brian D McCabe
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, VD 1015 Lausanne, Switzerland.
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2
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Das D, Ghosh G, Dutta A, Sherpa RD, Ghosh P, Hui SP, Ghosh S. Fruit ripening retardant Daminozide induces cognitive impairment, cell specific neurotoxicity, and genotoxicity in Drosophila melanogaster. Neurotoxicology 2024; 103:123-133. [PMID: 38851594 DOI: 10.1016/j.neuro.2024.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 05/30/2024] [Accepted: 06/04/2024] [Indexed: 06/10/2024]
Abstract
BACKGROUND We explored neurotoxic and genotoxic effects of Daminozide, a fruit ripening retardant, on the brain of Drosophila melanogaster, based on our previous finding of DNA fragmentation in larval brain cell in the flies experimentally exposed to this chemicals. METHODS Adult flies were subjected to two distinct concentrations of daminozide (200 mg/L and 400 mg/L) mixed in culture medium, followed by an examination of specific behaviors such as courtship conditioning and aversive phototaxis, which serve as indicators of cognitive functions. We investigated brain histology and histochemistry to assess the overall toxicity of daminozide, focusing on neuron type-specific effects. Additionally, we conducted studies on gene expression specific to neuronal function. Statistical comparisons were then made between the exposed and control flies across all tested attributes. RESULTS The outcome of behavioral assays suggested deleterious effects of Daminozide on learning, short term and long term memory function. Histological examination of brain sections revealed cellular degeneration, within Kenyon cell neuropiles in Daminozide-exposed flies. Neurone specific Immuno-histochemistry study revealed significant reduction of dopaminergic and glutaminergic neurones with discernible reduction in cellular counts, alteration in cell and nuclear morphology among daminozide exposed flies. Gene expression analyses demonstrated upregulation of rutabaga (rut), hb9 and down regulation of PKa- C1, CrebB, Ace and nAchRbeta-1 in exposed flies which suggest dysregulation of gene functions involved in motor neuron activity, learning, and memory. CONCLUSION Taken together, our findings suggests that Daminozide induces multifaceted harmful impacts on the neural terrain of Drosophila melanogaster, posing a threat to its cognitive abilities.
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Affiliation(s)
- Debasmita Das
- Department of Zoology, University of Calcutta, Kolkata, India
| | - Gaurab Ghosh
- Department of Biological Sciences, Indian Institute of Science Education & Research (IISER)- Kolkata Mohanpur Campus, Mohanpur, Nadia, West Bengal, India
| | - Arthita Dutta
- Department of Zoology, University of Calcutta, Kolkata, India
| | - Rinchen D Sherpa
- S. N. Pradhan Centre for Neurosciences, University of Calcutta, Kolkata, India
| | - Papiya Ghosh
- Department of Zoology, Bijoykrishna Girls' College. Howrah. India
| | - Subhra Prakash Hui
- S. N. Pradhan Centre for Neurosciences, University of Calcutta, Kolkata, India
| | - Sujay Ghosh
- Department of Zoology, University of Calcutta, Kolkata, India.
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Li G, Li Y, He C, Wei Y, Cai K, Lu Q, Liu X, Zhu Y, Xu K. The promoting effects of pyriproxyfen on autophagy and apoptosis in silk glands of non-target insect silkworm, Bombyx mori. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 196:105586. [PMID: 37945223 DOI: 10.1016/j.pestbp.2023.105586] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 08/12/2023] [Accepted: 08/23/2023] [Indexed: 11/12/2023]
Abstract
Pyriproxyfen is a juvenile hormone analogue. The physiological effects of its low-concentration drift during the process of controlling agricultural and forestry pests on non-target organisms in the ecological environment are unpredictable, especially the effects on organs that play a key role in biological function are worthy of attention. The silk gland is an important organ for silk-secreting insects. Herein, we studied the effects of trace pyriproxyfen on autophagy and apoptosis of the silk gland in the lepidopteran model insect, Bombyx mori (silkworm). After treating fifth instar silkworm larvae with pyriproxyfen for 24 h, we found significant shrinkage, vacuolization, and fragmentation in the posterior silk gland (PSG). In addition, the results of autophagy-related genes of ATG8 and TUNEL assay also demonstrated that autophagy and apoptosis in the PSG of the silkworm was induced by pyriproxyfen. RNA-Seq results showed that pyriproxyfen treatment resulted in the activation of juvenile hormone signaling pathway genes and inhibition of 20-hydroxyecdysone (20E) signaling pathway genes. Among the 1808 significantly differentially expressed genes, 796 were upregulated and 1012 were downregulated. Among them, 30 genes were identified for autophagy-related signaling pathways, such as NOD-like receptor signaling pathway and mTOR signaling pathway, and 30 genes were identified for apoptosis-related signaling pathways, such as P53 signaling pathway and TNF signaling pathway. Further qRT-PCR and in vitro gland culture studies showed that the autophagy-related genes Atg5, Atg6, Atg12, Atg16 and the apoptosis-related genes Aif, Dronc, Dredd, and Caspase1 were responsive to the treatment of pyriproxyfen, with transcription levels up-regulated from 24 to 72 h. In addition, ATG5, ATG6, and Dronc genes had a more direct response to pyriproxyfen treatment. These results suggested that pyriproxyfen treatment could disrupt the hormone regulation in silkworms, promoting autophagy and apoptosis in the PSG. This study provides more evidence for the research on the damage of juvenile hormone analogues to non-target organisms or organs in the environment, and provides reference information for the scientific and rational use of juvenile hormone pesticides.
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Affiliation(s)
- Guoli Li
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Yizhe Li
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Chunhui He
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Yuting Wei
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Kunpei Cai
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Qingyu Lu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Xuebin Liu
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Yizhou Zhu
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Kaizun Xu
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China; Guangxi Key Laboratory for Agro-Environment and Agric-Product Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China; Sericulture Institute of Guangxi University, Nanning, Guangxi 530004, PR China.
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Jones E, McLaughlin KA. A Novel Perspective on Neuronal Control of Anatomical Patterning, Remodeling, and Maintenance. Int J Mol Sci 2023; 24:13358. [PMID: 37686164 PMCID: PMC10488252 DOI: 10.3390/ijms241713358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/14/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
While the nervous system may be best known as the sensory communication center of an organism, recent research has revealed a myriad of multifaceted roles for both the CNS and PNS from early development to adult regeneration and remodeling. These systems work to orchestrate tissue pattern formation during embryonic development and continue shaping pattering through transitional periods such as metamorphosis and growth. During periods of injury or wounding, the nervous system has also been shown to influence remodeling and wound healing. The neuronal mechanisms responsible for these events are largely conserved across species, suggesting this evidence may be important in understanding and resolving many human defects and diseases. By unraveling these diverse roles, this paper highlights the necessity of broadening our perspective on the nervous system beyond its conventional functions. A comprehensive understanding of the complex interactions and contributions of the nervous system throughout development and adulthood has the potential to revolutionize therapeutic strategies and open new avenues for regenerative medicine and tissue engineering. This review highlights an important role for the nervous system during the patterning and maintenance of complex tissues and provides a potential avenue for advancing biomedical applications.
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Affiliation(s)
| | - Kelly A. McLaughlin
- Department of Biology, Tufts University, 200 Boston Avenue, Suite 4700, Medford, MA 02155, USA;
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Asadzadeh J, Ruchti E, Jiao W, Limoni G, MacLachlan C, Small SA, Knott G, Santa-Maria I, McCabe BD. Retromer deficiency in Tauopathy models enhances the truncation and toxicity of Tau. Nat Commun 2022; 13:5049. [PMID: 36030267 PMCID: PMC9420134 DOI: 10.1038/s41467-022-32683-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 08/10/2022] [Indexed: 11/24/2022] Open
Abstract
Alteration of the levels, localization or post-translational processing of the microtubule associated protein Tau is associated with many neurodegenerative disorders. Here we develop adult-onset models for human Tau (hTau) toxicity in Drosophila that enable age-dependent quantitative measurement of central nervous system synapse loss and axonal degeneration, in addition to effects upon lifespan, to facilitate evaluation of factors that may contribute to Tau-dependent neurodegeneration. Using these models, we interrogate the interaction of hTau with the retromer complex, an evolutionarily conserved cargo-sorting protein assembly, whose reduced activity has been associated with both Parkinson’s and late onset Alzheimer’s disease. We reveal that reduction of retromer activity induces a potent enhancement of hTau toxicity upon synapse loss, axon retraction and lifespan through a specific increase in the production of a C-terminal truncated isoform of hTau. Our data establish a molecular and subcellular mechanism necessary and sufficient for the depletion of retromer activity to exacerbate Tau-dependent neurodegeneration. Tau and the Retromer complex are both linked to Parkinson’s and Alzheimer’s disease. Using Drosophila neurodegeneration models, this study finds that low retromer activity induces a specific increase of a highly toxic truncated form of human Tau.
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Affiliation(s)
- Jamshid Asadzadeh
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Evelyne Ruchti
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Wei Jiao
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Greta Limoni
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Catherine MacLachlan
- BioEM Facility, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Scott A Small
- Department of Neurology, Columbia University, New York, USA.,Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, USA
| | - Graham Knott
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland.,BioEM Facility, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Ismael Santa-Maria
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, USA.,Department of Pathology & Cell Biology, Columbia University, New York, USA.,Facultad Ciencias Experimentales, Universidad Francisco de Vitoria, Pozuelo de Alarcón, Madrid, Spain
| | - Brian D McCabe
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland.
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Banerjee S, Vernon S, Jiao W, Choi BJ, Ruchti E, Asadzadeh J, Burri O, Stowers RS, McCabe BD. Miniature neurotransmission is required to maintain Drosophila synaptic structures during ageing. Nat Commun 2021; 12:4399. [PMID: 34285221 PMCID: PMC8292383 DOI: 10.1038/s41467-021-24490-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 06/22/2021] [Indexed: 11/27/2022] Open
Abstract
The decline of neuronal synapses is an established feature of ageing accompanied by the diminishment of neuronal function, and in the motor system at least, a reduction of behavioural capacity. Here, we have investigated Drosophila motor neuron synaptic terminals during ageing. We observed cumulative fragmentation of presynaptic structures accompanied by diminishment of both evoked and miniature neurotransmission occurring in tandem with reduced motor ability. Through discrete manipulation of each neurotransmission modality, we find that miniature but not evoked neurotransmission is required to maintain presynaptic architecture and that increasing miniature events can both preserve synaptic structures and prolong motor ability during ageing. Our results establish that miniature neurotransmission, formerly viewed as an epiphenomenon, is necessary for the long-term stability of synaptic connections. Synaptic structures disintegrate and fragment as ageing progresses. Here the authors find that miniature neurotransmission is required to maintain adult motor synapse structures in Drosophila and that increasing miniature events can preserve motor ability during ageing.
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Affiliation(s)
- Soumya Banerjee
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Samuel Vernon
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Wei Jiao
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Ben Jiwon Choi
- Department of Biology, New York University, New York, USA
| | - Evelyne Ruchti
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Jamshid Asadzadeh
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - Olivier Burri
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland
| | - R Steven Stowers
- Department of Cell Biology and Neuroscience, Montana State University, Bozeman, USA
| | - Brian D McCabe
- Brain Mind Institute, EPFL - Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland.
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7
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Lee G, Park JH. Programmed cell death reshapes the central nervous system during metamorphosis in insects. CURRENT OPINION IN INSECT SCIENCE 2021; 43:39-45. [PMID: 33065339 PMCID: PMC10754214 DOI: 10.1016/j.cois.2020.09.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/08/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
Metamorphosis is fascinating and dramatic stage of postembryonic development in insects [1]. The most prominent metamorphic changes seen in holometabolous insects involve destruction of most larval structures and concomitant generation of adult ones. Such diverse cellular events are orchestrated by ecdysone. The central nervous system (CNS) is also extensively remodeled to process new sensory inputs; to coordinate new types of locomotion; and to perform higher-order decision making [2]. Programmed cell death (PCD) is an integral part of the metamorphic development. It eliminates obsolete larval tissues and extra cells that are generated from the morphogenesis of adult tissues. In the CNS, PCD of selected neurons and glial cells as well as reshaping of persistent larval cells are essential for establishing the adult CNS. In this review, we summarize the ecdysone signaling, and then molecular and cellular events associated with PCD primarily in the metamorphosing CNS of Drosophila melanogaster.
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Affiliation(s)
- Gyunghee Lee
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Knoxville TN 37996, United States
| | - Jae H Park
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Knoxville TN 37996, United States.
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8
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Subramanian A, Siefert M, Banerjee S, Vishal K, Bergmann KA, Curts CCM, Dorr M, Molina C, Fernandes J. Remodeling of peripheral nerve ensheathment during the larval-to-adult transition in Drosophila. Dev Neurobiol 2017; 77:1144-1160. [PMID: 28388016 DOI: 10.1002/dneu.22502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 03/27/2017] [Accepted: 03/29/2017] [Indexed: 12/30/2022]
Abstract
Over the course of a 4-day period of metamorphosis, the Drosophila larval nervous system is remodeled to prepare for adult-specific behaviors. One example is the reorganization of peripheral nerves in the abdomen, where five pairs of abdominal nerves (A4-A8) fuse to form the terminal nerve trunk. This reorganization is associated with selective remodeling of four layers that ensheath each peripheral nerve. The neural lamella (NL), is the first to dismantle; its breakdown is initiated by 6 hours after puparium formation, and is completely removed by the end of the first day. This layer begins to re-appear on the third day of metamorphosis. Perineurial glial (PG) cells situated just underneath the NL, undergo significant proliferation on the first day of metamorphosis, and at that stage contribute to 95% of the glial cell population. Cells of the two inner layers, Sub-Perineurial Glia (SPG) and Wrapping Glia (WG) increase in number on the second half of metamorphosis. Induction of cell death in perineurial glia via the cell death gene reaper and the Diptheria toxin (DT-1) gene, results in abnormal bundling of the peripheral nerves, suggesting that perineurial glial cells play a role in the process. A significant number of animals fail to eclose in both reaper and DT-1 targeted animals, suggesting that disruption of PG also impacts eclosion behavior. The studies will help to establish the groundwork for further work on cellular and molecular processes that underlie the co-ordinated remodeling of glia and the peripheral nerves they ensheath. © 2017 Wiley Periodicals, Inc. Develop Neurobiol 77: 1144-1160, 2017.
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Affiliation(s)
- Aswati Subramanian
- Department of Biology and Center for Neuroscience, Miami University, Oxford, Ohio
| | - Matthew Siefert
- Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Soumya Banerjee
- École Polytechnique Fédérale De Lausanne, Lausanne, CH-1015, Switzerland
| | | | - Kayla A Bergmann
- Department of Biology and Center for Neuroscience, Miami University, Oxford, Ohio
| | - Clay C M Curts
- Department of Biology and Center for Neuroscience, Miami University, Oxford, Ohio
| | - Meredith Dorr
- Barrington Health and Dental Center, 3401 East Raymond St., Indianapolis, IN, 46203
| | - Camillo Molina
- The Johns Hopkins School of Medicine, Baltimore, Maryland, 21287
| | - Joyce Fernandes
- Department of Biology and Center for Neuroscience, Miami University, Oxford, Ohio
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